不同坡口形式平板对接焊接变形的数值分析  

Analysis and Simulation of Different Groove of the Plate Butt Welding

作　　者：张仁军[1] 管晓光[2] 吴海涛[1] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司工艺处,黑龙江哈尔滨150046 [2]黑龙江科技学院材料学院,黑龙江哈尔滨150027

出　　处：《哈尔滨理工大学学报》2013年第2期42-45,51,共5页Journal of Harbin University of Science and Technology

摘　　要：运用有限元分析,采用双椭球体热源模型,通过几何建模、初始与边界条件的定义等,对平板对接焊结构三维有限元模拟,求解得到焊接应力场.结果表明:焊接过程中等效应力都表现出随着温度升高而升高,温度降低而降低的变化趋势,且冷却时应力变化速率较加热时缓慢.Y型与X型坡口最大等效应力发生的区域相同,X型坡口产生的等效应力小于Y型坡口的值.Plate butt welding of double-ellipsoidal heat source model was simulated. The initial conditions boundary conditions and geometric properties were defined. The results indicate that The equivalent stress decreases with the temperature decreasing. The change rate of the equivalent stress was smaller than heat process in the cooling process. There were same areas of the maximum equivalent stress with X and Y groove. Equivalent stress of X groove was less than the Y groove.

关 键 词：平板对接 X、Y型坡口 焊接模拟 等效应力 

分 类 号：TG404[金属学及工艺—焊接]